diablo-dupe

Your mission

Copy an inventory into out with every repeated id dropped, keeping the first of each.

today's brief

December 1996. Diablo trusts your own machine to say what is in your bag, so dropping an item and cutting the connection at the right instant leaves it lying on the ground and sitting in your inventory. The sequel inherited the whole family of bugs, and duped Stones of Jordan became the currency the ladder economy priced everything in. Blizzard wiped inventories more than once. Keep the first copy of each item.

See it in action

unique_items(out, {2,7,2,7,9}, 5)

Expected result

3: 2 7 9

Your checklist

For your own tracking. Tests grade your code.

ids holds n item ids in inventory order, and out has room for n of them.
Write into out the ids that have not appeared earlier in ids, in the order they appear.
Return how many ids were written.

More examples

unique_items(out, {5,5,5}, 3)

Expected result

1: 5

unique_items(out, {1,2,3}, 3)

Expected result

3: 1 2 3

Constraints

Expected files

stash.c

Allowed functions

None. Write every helper yourself.

Back to compete

Solutions

diablo-dupe

Your mission

Copy an inventory into out with every repeated id dropped, keeping the first of each.

today's brief

See it in action

unique_items(out, {2,7,2,7,9}, 5)

Expected result

3: 2 7 9

Your checklist

For your own tracking. Tests grade your code.

ids holds n item ids in inventory order, and out has room for n of them.
Write into out the ids that have not appeared earlier in ids, in the order they appear.
Return how many ids were written.

More examples

unique_items(out, {5,5,5}, 3)

Expected result

1: 5

unique_items(out, {1,2,3}, 3)

Expected result

3: 1 2 3

Constraints

Expected files

stash.c

Allowed functions

None. Write every helper yourself.

Back to compete

Solutions